Jiang Fangzhou has ink in her veins.She published her first book at 9, and waselected chairwoman of China’s YouthWriters Association at middle school. Nowshe has scaled even more dizzy heights bybeing admitted to the...Jiang Fangzhou has ink in her veins.She published her first book at 9, and waselected chairwoman of China’s YouthWriters Association at middle school. Nowshe has scaled even more dizzy heights bybeing admitted to the prestigious展开更多
Based on micro-level student data from one Chinese academic institution, we study the validity of the national college entrance exam from the perspective of student performance in college and employment prospects afte...Based on micro-level student data from one Chinese academic institution, we study the validity of the national college entrance exam from the perspective of student performance in college and employment prospects after graduation. We find that the current college entrance exam could reflect the students＇ learning ability to a certain degree, providing a relatively valid evaluation. Demonstration of well-rounded development ability should be an important factor in the evaluation system. Based on our empirical results, we give some suggestions for college entrance exam reform.展开更多
A new expectation-maximization（EM） algorithm is proposed to estimate the parameters of the truncated multinormal distribution with linear restriction on the variables. Compared with the generalized method of moments...A new expectation-maximization（EM） algorithm is proposed to estimate the parameters of the truncated multinormal distribution with linear restriction on the variables. Compared with the generalized method of moments（GMM） estimation and the maximum likelihood estimation（MLE） for the truncated multivariate normal distribution, the EM algorithm features in fast calculation and high accuracy which are shown in the simulation results. For the real data of the national college entrance exams（NCEE）, we estimate the distribution of the NCEE examinees＇ scores in Anhui, 2003, who were admitted to the university of science and technology of China（USTC）. Based on our analysis, we have also given the ratio truncated by the NCEE admission line of USTC in Anhui, 2003.展开更多
文摘Jiang Fangzhou has ink in her veins.She published her first book at 9, and waselected chairwoman of China’s YouthWriters Association at middle school. Nowshe has scaled even more dizzy heights bybeing admitted to the prestigious
文摘Based on micro-level student data from one Chinese academic institution, we study the validity of the national college entrance exam from the perspective of student performance in college and employment prospects after graduation. We find that the current college entrance exam could reflect the students＇ learning ability to a certain degree, providing a relatively valid evaluation. Demonstration of well-rounded development ability should be an important factor in the evaluation system. Based on our empirical results, we give some suggestions for college entrance exam reform.
基金Supported by the National Natural Science Foundation(Grant No.11571337,11271347,71172214)
文摘A new expectation-maximization（EM） algorithm is proposed to estimate the parameters of the truncated multinormal distribution with linear restriction on the variables. Compared with the generalized method of moments（GMM） estimation and the maximum likelihood estimation（MLE） for the truncated multivariate normal distribution, the EM algorithm features in fast calculation and high accuracy which are shown in the simulation results. For the real data of the national college entrance exams（NCEE）, we estimate the distribution of the NCEE examinees＇ scores in Anhui, 2003, who were admitted to the university of science and technology of China（USTC）. Based on our analysis, we have also given the ratio truncated by the NCEE admission line of USTC in Anhui, 2003.
